[AnthonyMouse]

You still want a cheap mobile plan, so it's not technically cheaper until you have 4 people.

But that's comparing fiber to 10Mbps cellular, and even with 2 people the fiber is dramatically faster and only €20 more expensive. If you can live with 10Mbps then there is presumably some broadband option at no worse than that speed for less than €30 and then you're already ahead with 2 people.

And most people aren't going to be happy with speeds that low, but then you'd be paying more for each cellular plan.

[_0w8t]

In Norway there is no realistic option to have fiber cheaper than 45-50 Euro per month.

Based on personal experience 10 MBit/s is enough for video including full HD options. In fact it worked better than 100 MBit/s that was shared with several users and when somebody was downloading big gaming files.